infinite loop test (#6064)

src/test/app/Wasm_test.cpp

@@ -467,6 +467,20 @@ struct Wasm_test : public beast::unit_test::suite
             BEAST_EXPECT(countSubstr(s, "exception: <finish> failure") > 0);
         }
 
+        {  // infinite loop
+            auto const wasmStr = boost::algorithm::unhex(infiniteLoopWasmHex);
+            Bytes wasm(wasmStr.begin(), wasmStr.end());
+            std::string const funcName("loop");
+            TestHostFunctions hfs(env, 0);
+
+            // infinite loop should be caught and fail
+            auto const re = runEscrowWasm(wasm, hfs, funcName, {}, 1'000'000);
+            if (BEAST_EXPECT(!re.has_value()))
+            {
+                BEAST_EXPECT(re.error() == tecFAILED_PROCESSING);
+            }
+        }
+
         {
             // expected import not provided
             auto wasmStr = boost::algorithm::unhex(ledgerSqnWasmHex);

src/test/app/wasm_fixtures/fixtures.cpp

@@ -1208,3 +1208,19 @@ extern std::string const wasiPrintHex =
     "656d6f727902000666696e69736800010a1d011b01017f4118210041014100410120001000"
     "45047f410105417f0b0b0b1e030041100b0648656c6c6f0a0041000b04100000000041040b"
     "0406000000";
+
+extern std::string const infiniteLoopWasmHex =
+    "0061736d010000000108026000006000017f030302000105030100020638097f004180080b"
+    "7f004180080b7f004180080b7f00418088040b7f004180080b7f00418088040b7f00418080"
+    "080b7f0041000b7f0041010b07a8010c066d656d6f72790200115f5f7761736d5f63616c6c"
+    "5f63746f72730000046c6f6f7000010c5f5f64736f5f68616e646c6503000a5f5f64617461"
+    "5f656e6403010b5f5f737461636b5f6c6f7703020c5f5f737461636b5f6869676803030d5f"
+    "5f676c6f62616c5f6261736503040b5f5f686561705f6261736503050a5f5f686561705f65"
+    "6e6403060d5f5f6d656d6f72795f6261736503070c5f5f7461626c655f6261736503080a27"
+    "0202000b220041fc87044100360200034041fc870441fc870428020041016a3602000c000b"
+    "000b007f0970726f647563657273010c70726f6365737365642d62790105636c616e675f31"
+    "392e312e352d776173692d73646b202868747470733a2f2f6769746875622e636f6d2f6c6c"
+    "766d2f6c6c766d2d70726f6a65637420616234623561326462353832393538616631656533"
+    "303861373930636664623432626432343732302900490f7461726765745f66656174757265"
+    "73042b0f6d757461626c652d676c6f62616c732b087369676e2d6578742b0f726566657265"
+    "6e63652d74797065732b0a6d756c746976616c7565";

src/test/app/wasm_fixtures/fixtures.h

@@ -64,3 +64,5 @@ extern std::string const trapFuncSigMismatchHex;
 
 extern std::string const wasiGetTimeHex;
 extern std::string const wasiPrintHex;
+
+extern std::string const infiniteLoopWasmHex;

src/test/app/wasm_fixtures/infiniteLoop.c

@@ -0,0 +1,8 @@
+int
+loop()
+{
+    int volatile x = 0;
+    while (1)
+        x++;
+    return x;
+}